... and white carbon black.Low price and good quality. Usage: In the industries of paper, soap, detergent, construction materials, delicate ... mineral floating select. And it is primary raw material of silicon rubber, silicon aluminum rubber, moisture absorbent, catalyst and its carrier, desalt ... -52.0Sodium oxide (Na2O),% >7.08.210.29.512.8Silicon dioxide (SiO2),% > 24.626.025.722.129.2Modulus M3.5-3 ...